As the standard deviation of an average of several measurements increases,_____.
A) the accuracy of the measurement increases.
B) the precision of the measurement increases.
C) the accuracy and precision of the measurement decreases.
D) the accuracy of the measurement decreases.
E) the precision of the measurement decreases.

Question

Quizplus · Accepted Answer

An increase in the standard deviation of an average of several measurements indicates that the measurements are more spread out from the mean, which directly implies a decrease in the precision of those measurements. Precision refers to how close the measurements are to each other, not necessarily to the true value.

As the Standard Deviation of an Average of Several Measurements